Enhancing Strawberry Freshness: Multifunction Sustainable Films Utilizing Two Types of Modified Carbon Nanotubes for
Xianrui Chen1, Lin Wang1,2, Di Zhang1
1College of Food Science, Fujian Agriculture and Forestry University, Fuzhou 350002, China.
ACS Applied Materials & Interfaces
|November 6, 2024
Summary
This study developed a novel konjac glucomannan-sodium alginate composite film incorporating carbon nanotubes and Fe3+ for food packaging. The film shows excellent antibacterial and photothermal properties, extending strawberry shelf life.
Area of Science:
- Materials Science
- Food Science
- Nanotechnology
Background:
- Antimicrobial films are crucial for food packaging to enhance shelf life and safety.
- Developing films with stable antibacterial activity, UV resistance, and oxidation resistance is a key challenge.
Purpose of the Study:
- To create a novel konjac glucomannan-sodium alginate (KGM-SA) composite film with enhanced properties for food packaging.
- To investigate the antibacterial and photothermal capabilities of the developed film.
Main Methods:
- A solvent flow method was used to prepare the KGM-SA@carbon nanotubes (CNTs)/Fe3+ composite film.
- The film incorporated tannic acid-modified and l-cysteine-modified CNTs, along with Fe3+.
- Characterization included structural analysis, water vapor permeability, water contact angle, thermal stability, and photothermal conversion efficiency tests.
Main Results:
- The composite film exhibited a dual-cross-linked network structure with excellent water resistance and thermal stability.
- The film demonstrated outstanding photothermal conversion efficiency under near-infrared irradiation.
- Exceptional bactericidal properties against Staphylococcus aureus and Escherichia coli were observed (>99% inhibition).
Conclusions:
- The KGM-SA@CNTs/Fe3+ composite film offers superior antimicrobial, photothermal, and mechanical properties for food packaging applications.
- The film significantly extended the shelf life of strawberries by 4-6 days.
- This research presents a promising application of CNTs in developing advanced photothermal antibacterial food packaging.
Keywords:
Carbon nanotubesKonjac glucomannanNanoparticlesPackaging filmPhotothermal sterilizationSodium alginateMore Related Videos
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